JP3026169B2 - connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single energizing line which is generally used as a power line, which is insulated and covered.
A two-core or three-core VVF cable in which three or three wires are arranged in parallel and the outer periphery of which is covered with an outer cover is targeted, and another VVF cable is used at the time of wiring such a VVF cable or at the existing wiring already wired. To obtain a branch line by connecting
The present invention relates to a connector suitable for connecting and branching a current-carrying line on the positive electrode side of existing wiring and a current-carrying line on a positive electrode side of a branch line without error.

[0002]

2. Description of the Related Art Conventionally, it is often necessary to obtain a branch line by connecting another two-core or three-core VVF cable to such a two-core or three-core VVF cable. In this case, since it is necessary to distinguish the positive side and the negative side of the core wire when energizing various devices, VVF is generally used.
The color of the interior coating of the cable is a different color that is easy to identify. For example, in a two-core VVF cable, the core wire is formed in two colors, white and black.
Many are formed in three colors of red, white and black.
When a branch line is taken out from the main line, core lines of the same color having the same polarity as the main line and the branch line are connected to each other.

In such a branch line removal work, when the main line is a branch line, after turning off the power to eliminate the danger, generally, as shown in FIG. First, the VVF cable 3 on the main line side is cut at a required place, the respective outer coverings 31 are removed, the covering wires on the positive and negative sides are respectively taken out, and the inner coverings 32 are further removed to remove the core coverings. Expose 33. Similarly, for the VVF cable 3 ′ on the branch side,
1 and the inner cover 32 on the positive electrode side and the negative electrode side are respectively removed to expose the core wire 33, and then the positive electrode side core wire 3 of the main wire is removed.
3 and the positive-side core wire 33 of the branch wire are put together, inserted into the metal sleeve 6 provided inside the closed-end insulating cap 61, and pressurized from above by a press tool to deform the metal sleeve 6 under pressure. Then, the core wires on the negative electrode side were connected to each other in the same manner.

[0004]

In such a means,
If the main line, which is the branch line, is a branch line, the power must be turned off before the branching work because of the necessity of electric shock prevention. Since it is very troublesome, there is a problem that the construction time is long and the working efficiency is poor.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a connector capable of safely and quickly branching an electric wire without stripping the inner and outer coatings of a VVF cable as described above. Things.

[0006]

In order to achieve the above object, the present invention takes the following measures. That is, the connector of the present invention is a connector used for connecting and branching a 2-core or 3-core VVF cable 3 ′ for branching from the 2-core or 3-core VVF cable 3, and is a highly conductive metal. And two or three contacts 1 made of a plate, and a main body 2 made of synthetic resin having a high insulating property.
However, the cross-sectional shape viewed from the side is substantially inverted U-shape, and the two VVF cables 3 are attached to the respective parallel pieces 1a, 1a.
The cutouts 11 and 11 are formed at predetermined intervals D so as to cut the 3 'insulating sheath 31 and the insulating inner skin 32 and contact the conducting wires 33 and 33 having the same polarity of each cable, respectively. The cutting blades 13, 13 for cutting the cable through the insulating sheath 31, entering between the adjacent insulating inner skins 32, and dividing the cables into left and right parts, form the two notches 11, 11.
, And the main body 2 is
Two half-split main body components 2 each having two parallel grooves 21 and 22 formed at a predetermined interval E through which the VF cables 3 and 3 ′ are inserted, and formed to be fittable with each other.
a, 2a, one of the main body 2a is provided with a plurality of insertion holes 23 for inserting the contacts 1, and the width of the two grooves 21 and 22 is equal to the width of the two VVFs.
The width W on the large diameter side where the conducting wires 33 of the cables 3 and 3 'are juxtaposed.
Are formed to have substantially the same width, respectively.
22 and two notches 1 of the contact 1
The insertion holes 23 are formed so as to be shifted from each other by an interval of the horizontal pitch of the conducting wires 33 in the VVF cable. A shield wall 28 for receiving the end face of the VVF cable is formed at one end of the VCF 22. On one surface of the shield wall 28, a vertically long insulating projection 28a that cuts between the conductive wires 33 of the VVF cable that abuts the shield wall is provided. The configuration is provided.

The two grooves 21 and 22 are formed so as to penetrate the entire width of the main body components 2a and 2b, respectively. A groove 22 for inserting the branch side VVF cable 3 'is provided with a shielding wall 28 at one end thereof. It is assumed that only one branch line is obtained by applying the cut end of the VVF cable 3 'on the branch side to the shielding wall 28 and protruding only in one direction.

The contact 1 is made of a material which is higher in hardness and superior in conductivity than soft copper used for the conducting wire of the VVF cable 3, such as a hard copper alloy plate having high hardness. preferable. The cut interval (slit interval) of the cut portion 11 of the contact is
Is pressed against the VVF cable 3,
Coating outer sheath (outer sheath) 31 of cable in cooperation with cutting blade 13
And the inner coating (endothelium) 32, and the cut portion 11
The width is slightly smaller than the thickness of the energizing line 33 because the energizing line 33 is energized with the energizing line 33 on the opposite inner surface. In this manner, it is preferable that the energizing wire 33 be firmly pressed and clamped from both sides while plastically deforming the energizing wire 33 by the pressing force during the energizing operation.

Further, the thickness (plate thickness) of the contact 1 and the interval between the cuts 11 are set such that the contact area is equal to or larger than the cross-sectional area of the conducting wire 33 in the state of contact with the conducting wire 33. It is good to keep.

[0010]

1 to 8 show an embodiment of a connector according to the present invention for a three-core VVF cable. Reference numeral 1 denotes a contact. The contact 1 is a substantially inverted U-shaped side view formed by press-molding a brass plate having high electrical conductivity and a hardness higher than the hardness of the three-core VVF cable 3, 3 'to be used.
a, 1a, the two cutouts 11, 11 which cut the insulating sheath 31 and the insulating inner skin 32 of the two VVF cables 3, 3 'and insert and contact one of the conducting wires 33 in the cable have a predetermined distance D. And a concave portion 12 for separating the cut portions 11 is provided at an intermediate portion. Further, the cutting blades 13, 13 for cutting the cable through the insulating outer cover 31, entering between the adjacent insulating inner coats 32, and dividing the cables into right and left parts are provided with two pieces 1 a, 1 a near the two cut parts 11, 11. Are formed along the direction connecting. The lower ends of the cuts 11 are formed in a V-shape like a cutting blade.
While cutting the outer skin 31 and inner skin 32 of the cables 3, 3 ′, they reach the inner energizing line 33, and hold the energizing line 33 while pressing and deforming it from both sides. The cut portions 11, 11 are formed to be slightly upwardly inclined so as to be pressed in a direction in which a current-carrying wire to be connected in the cable is separated from another current-carrying wire when pushed into the cable. The contact 1 has an insulating resin plate 14 attached to the upper surface of the connection bottom portion 12.

The thickness of the contact 1 and the notch 1
The width of 1 is set by calculation such that the area of the portion in contact with the energizing wires 3 and 3 ′ by pressure welding is substantially equal to or larger than the cross-sectional area of the energizing wire. Now, looking at two types of diameters of the conducting wire to be used, 1.6 mm and 2.0 mm, when the conducting wire diameter is 1.6 mm, the contact 1
Is 0.5 mm, the width of the cut portion 11 may be about 1.2 mm. If the thickness of the contact 1 is 0.6 mm when the diameter of the conducting wire is 2.0 mm, the width of the cut portion 11 may be about 1.5 mm.

The connector body 2 is integrally formed of a resin material such as nylon, polyethylene or polypropylene. The connector main body 2 is composed of two main body components 2a and 2b of substantially the same shape and a half body, and a cover body 26. Each of the main body components 2a and 2b is provided on the branch line side (branched side). Two grooves 21 and 22 for inserting and fitting the VVF cable 3 and the branching VVF cable 3 ′ are formed in parallel at a predetermined interval E. One main body 2a is provided with three insertion holes 23 for inserting the contacts 1 respectively, and is connected to the other body 2b by a foldable portion 24 on one side so as to be freely foldable. These main body components 2a, 2b are structured so as to be fitted to each other at the free end side through an engagement piece 20b and an engagement hole 20a. Further, the cover body 26 is extended outside on an extension line along the groove direction of the main body structure 2a through a flexible connecting band 25 and is foldably connected to a contact insertion surface of the main body structure 2a. ing. The cover body 26 is provided with engaging claws 27 that engage with engaging holes 27a provided on the side surface of the main body component 2a. Further, a hook portion 35 for hooking the connector is provided on the main body 2b.

The width of each of the grooves 21 and 22 is the same as that of the three cores VV.
Large diameter (wide side) with F cable 3, 3 'conducting wires arranged side by side
Are formed to have widths substantially equal to the width W of each of the two main body components 2.
a, 2b Groove 2 in Folding Position with Fit
The opposing widths (the sum of the depths of the opposing grooves) between 1, 21, 22, and 22 are almost the same as the width w on the narrow side of each VVF cable 3, 3 ', and the cables are sandwiched without gaps. It is formed to a width that can be used. The space between these two grooves 21 and 22, that is, the space E between the center lines,
Are formed at intervals between the two cut portions 11 of the contact 1, that is, at intervals substantially matching the interval D between the center lines. Also, three insertion holes 2 for inserting the contacts 1
3 have a shape along the plane shape of the contact 1 as shown in FIGS. 1 and 4, and have a size suitable for inserting and temporarily holding the lower half of the contact 1. It is. The three insertion holes 23 are formed so as to be shifted from each other in the width direction of the groove by an interval of the horizontal pitch of the three conducting wires 33 in the VVF cable.

The folded portion 24 of the two main body components 2a, 2b is formed in a W-shape in side view, and the lower bottom portion thereof is formed thin. Thus, contact 1 is shown in FIG.
As can be seen in FIG.
And temporarily held in the respective insertion holes 23, 23.

The above-mentioned connector is a connector for obtaining only one branch line from the VVF cable 3 on the branch line side. The connector has a groove 22, 22 on the side through which the VVF cable 3 'on the branch side is inserted. A shielding wall 28, 28 for closing the groove is formed at one end of the 22. The cut end of the VVF cable 3 'on the branch side is applied to the shielding wall 28 so that it can protrude only in one direction. It is. On one surface of the shielding wall 28 facing the cable insertion side, there are provided vertically long acutely projecting insulating protrusions 28a, 28a that bite between the energizing wires 33 of the VVF cable that contact the shielding wall. After attaching the connector to the branch cable 3 as described above, the branch side cable 3 ′ is pushed in from the opening formed on the side by the grooves 22, 22 until the distal end contacts the shielding wall 28. Two cables 3, 3 '
To the connector in parallel. At this time, as shown in FIG. 9, the insulating projections 28a, 28a bite between the conducting wires 33, 33, 33 of the VVF cable, and electrically isolate these conducting wires to reliably prevent a short circuit at the cable cutting portion. Can be prevented. It is preferable that the protrusion 28a is formed so that the upper end thereof is also sharp as shown in FIG. Accordingly, even when the left and right components 2a and 2b are fitted after the branch-side VVF cable 3 'is inserted into the groove 22 in advance, the insulating protrusion 28a is kept in the VVF.
It can be cut between the conductive wires of the cable.

In order to branch an electric wire using the connector constructed as described above, the three-core VVF cable 3 on the wired side (branch side / branched line side) is covered with the three cores shown in FIG.
As shown in FIG. 3, one of the main bodies 2a and 2b (here, 2b) is inserted into the groove 21 so that the cross section is in the horizontal posture, and the three cores for branching are inserted into the adjacent groove 22. The line on the positive or negative side of the VVF cable 3 ′, which has been confirmed by the cut end face, is selected in a direction that matches the positive or negative line on the main line side, and the cut end face is connected to the shielding plate 2.
4, and then, as shown in FIG. 4, the other component (here, 2 a) is folded from the folded portion 24, placed over it and pressed, and engaged with the engaging claw piece 20 b on the other side. The insertion holes 20a are fitted to each other.
In this structure fitting state, the branch line side cable 3 ′
May be inserted through the opening.

Next, as shown in FIG.
Is pressed by a suitable pressing tool A so that the entire contact 1 is buried in the contact insertion hole 23 as shown in FIG. 6, and finally, as shown in FIG. 25, the outer surface of the contact 1 is covered, and the engaging claws 27 formed at the respective corners are engaged and connected to the engaging holes 27a formed in the main body constituting body 2a.

As shown in FIG. 8, the pressurized contact 1 cuts the outer cover 31 and the inner cover 32 of the cables 3 and 3 'inside the connector body 2 so that the conducting wires 33 and 33 on the same pole side of both cables. Electrical contact with the cutting blade 1
By 3, the cable is divided right and left from between the current-carrying wire contacting the contact 1 and the other two current-carrying wires. At this time,
Each of the cuts 11, 11 is a respective cable 3,
The 3 ′ left and right energizing lines 33 are formed so as to be inclined in a direction that separates the left and right energizing lines. The safety can be improved by separating the energizing wire from the left and right. In this way, the branch line is branched from the existing wiring or the main line. Also, one of the cover members 2
The hook body 35 provided on the connector 6 allows the connector together with the cables 3 and 3 to be hung on a building or a building, which is convenient.

Since the three insertion holes 23 are formed so as to be shifted laterally by the horizontal pitch of the three conducting wires 33 in the VVF cable, the respective insertion holes 2 are formed.
3 can connect the same-polarity conducting wires of the left and right three-core VVF cables.

In the present invention, the inverted U-shaped contact 1 can also be manufactured by coating a metal plate of a contact forming material with an insulating layer in advance, and then forming the same into a predetermined shape. . The metal plate used as a material is the VVF cable 3, 3 ′.
Any material may be used as long as it is higher in hardness and relatively lower in electric resistance than the current-carrying wire, that is, a material excellent in conductivity, and may be a material other than a copper alloy plate.

In the above embodiment, the connector used for the three-core VVF cable has been described. However, the number of the connector 1 of the main body and the number of the contact insertion holes 23 of the main body are set to two to constitute a connector for the two-core VVF cable. It is also possible. In this case, it is needless to say that other configurations are the same as those in the above-described embodiment.

Although the embodiments and modifications which are considered to be representative of the present invention have been described above, the present invention is not necessarily limited only to the structures of these embodiments and modifications. For example, in the above-described embodiment, the half-shaped components 2a and 2b of the main body 1 are integrally connected in a foldable manner so as to be foldable by the folding unit 24. However, each of the components 2a and 2b is formed separately. Of course, it is also possible to configure so as to fit and connect with each other. In addition, the present invention has the above constitutional requirements, achieves the object of the present invention, and can be appropriately modified and implemented within a range having the following effects.

[0023]

Since the present invention is constructed as described above, it is possible to cut off the electric current even if the branch line is a bundled line, by simply pressing the contact into the 3-core VVF cable. And the special structure of the notch of the contact allows the left and right conducting wires with different poles in the same cable to be separated from each other to improve safety. Since the body has a simple structure of an integrally molded product, it can be provided at low cost.

Further, according to the present invention, a shielding wall is provided at one end of one of the cable insertion grooves, and one surface of the shielding wall facing the cable insertion side is provided between the energizing wires of the VVF cable abutting on the shielding wall. Since the vertical insulating protrusion that cuts into it was provided,
When the branch-side cable is installed in this groove, the insulation protrusion cuts between the conducting wires at the cut end surface of the branch-side cable,
There is an effect that these energized wires can be electrically isolated to reliably prevent a short circuit at a cable cutting portion.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a connector according to the present invention, and is an entire perspective view of a back side of a main body before a contact is inserted.

FIG. 2 is a perspective view of the inner surface side of the main body of FIG. 1 with a three-core VVF cable inserted into a groove.

FIG. 3 is an enlarged perspective view of a shielding wall portion of the connector.

FIG. 4 is a perspective view of the rear surface of the main body, showing a state where only the tip portion of the contact is temporarily inserted.

FIG. 5 is a perspective view showing a process of press-fitting a contact with a press-fitting tool in a state where the left and right main body components are folded and the cable is fitted.

FIG. 6 is a perspective view showing a state where a contact is press-fitted.

FIG. 7 is a perspective view showing a state in which a cable is completed with the cover body covered.

FIG. 8 is an enlarged sectional view showing a contact insertion state.

FIG. 9 is an enlarged cross-sectional view showing a state where a branch-side cable is inserted into a branch-side groove of the main body.

FIG. 10 is a front view showing another example of the insulating protrusion according to the present invention.

FIG. 11 is a perspective view showing another example of the connector of the present invention.

FIG. 12 is a perspective view showing an example of conventional means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact 11 Cut part 13 Cutting blade 2 Main body 2a Main body structure 2b Main body structure 20a Fitting part 20b Fitting part 21 Groove 22 Groove 23 Contact insertion hole 28 Shielding wall 28a Insulating protrusion 3 Hot wire side VVF cable 3 'Branch side VVF cable 31 Insulated outer sheath 32 Insulated endothelium 33 Conducting wire D Notch spacing E Groove spacing W Width of parallel conducting wire w Width of narrow conducting wire

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-48-100687 (JP, A) JP-A-7-130409 (JP, A) JP-A 10-125365 (JP, A) 44472 (JP, U) Japanese Utility Model 63-171971 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 4/24 H01R 4/70 H01R 9/03 H01R 12/08 H01R 12/38

Claims (1)

(57) [Claims] 1. A connector used for connecting and branching a 2-core or 3-core VVF cable (3 ') for branching from a 2-core or 3-core VVF cable (3), wherein the metal plate is rich in electrical conductivity. , And a main body (2) made of a synthetic resin rich in insulation, and the contact (1) has a substantially inverted U-shaped cross-sectional shape viewed from the side, Connect the two VVF cables to the two parallel pieces (1a) and (1a).
(3) and (3 ') cut the insulating sheath (31) and the insulating inner sheath (32), and cut into two notches (11) that respectively contact the conducting wires (33) and (33) to be connected to each cable. ) And (11) are formed at a predetermined interval (D), and cut the insulation sheath (31) of the cable and enter between the adjacent insulation inner sheaths (32) and (32) to divide them into right and left. Cutting blades (13) and (13) are
1), and the main body (2) is formed near
It has two parallel grooves (21) and (22) formed at a predetermined interval (E) through which both VVF cables (3) and (3 ') are inserted, and is formed so as to be fittable with each other. Of the main body (2a) and (2b).
a) has a plurality of insertion holes (2) for inserting the contacts (1).
3) are provided, and the width of the two grooves (21) and (22) is the width on the large diameter side where the energizing wires (33) of the two VVF cables (3) and (3 ') are juxtaposed. (W) are formed to have almost the same width as
The interval (E) between the grooves (21) and (22) and the interval (D) between the two cut portions (11) and (11) of the contact (1) are formed at intervals substantially coincident with each other. The holes (23) are formed so as to be displaced in the width direction of the groove by an interval of the horizontal pitch of the respective conducting wires (33) in the VVF cable, and a VVF is formed at one end of one of the grooves (22). A shielding wall (28) for receiving the end surface of the cable is formed, and one side of the shielding wall (28) facing the cable insertion side is provided with a conducting wire (33) of a VVF cable abutting the shielding wall.
A connector provided with vertically elongated insulating projections (28a) that bite into each other.